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Cankerworms

There are both Fall and Spring Cankerworms, which are often called inchworms or loopers. Cankerworms are easily identified because they only have feet at their front and rear, and they move by moving their rear portion forward in an arching motion. The cankerworms eat tree leaves for about five weeks, during the summer. Repeated defoliation on a mature tree severely weakens the tree to the point it may die or it becomes more susceptible to another fatal disease.